\chapter{Features}

\section{Compulsary features}
The bicycle computer should be able to...
\begin{itemize}
\item show the speed
\item show the distance
\item show an average speed
\item have a two-button user-interface (change display and reset)
\end{itemize}

\section{Optional features}
The bicycle computer could also...
\begin{itemize}
\item have an online adjustable wheel size (wheel circumference)
\item have an extra distance and av. speed counter/display (e.g. for the trip)
\item be designed to be energy saving (sleep)
\item change the frequency counting mode (time counting and pulse counting)
\item estimate power with the help of an tilt sensor (inclinometer, realized with an accelerometer)
\item computer connection for data transfer
\item longtime storage of data (in eeprom)
\end{itemize}